Re: Banding on Apple 23" Cinema Display
Re: Banding on Apple 23" Cinema Display
- Subject: Re: Banding on Apple 23" Cinema Display
- From: "Markus Hitzler, Color Solutions" <email@hidden>
- Date: Thu, 15 Feb 2007 12:40:17 +0100
Hello,
As Steve Upton and Todd Shirley already mentioned, banding is in most
instances a question of the calibration software (or more detailed: the
suitability of the calibration algorithm, measurement points and the
software settings regarding your hardware/hardware settings).
Especially quality and smoothness of the grey axis can be very different
between several calibration systems.
What system and which settings did you use?
Often the result becomes better, when you reduce the brightness setting of
the monitor. We had for example excellent results on Apple's 20" cinema
display and 20"-iMac's, when we reduced the brightness to 130 - 160 cd/sqm,
using the new hardware luminance calibration for Apple displays in
basICColor display 4.1. This function does a combined hardware/software
calibration and determines automatically the best adjustments for hardware
luminance and videoLUT/graphic board, to achieve the desired white point at
a well-defined luminance point.
Best regards,
Markus Hitzler
_______________________________________________
Color Solutions Koeln
Markus Hitzler
August-von-Willich-Str. 155
50827 Köln
Germany
phone: +49 (0)221 99 175 80
fax: +49 (0)221 99 175 81
mobile: +49 (0)171 8390333
Email: email@hidden
Web: http://www.color-solutions.de
_______________________________________________
Am 2/14/07 9:02 PM schrieb "email@hidden" unter
<email@hidden>:
> ------------------------------
>
> Message: 3
> Date: Tue, 13 Feb 2007 16:29:30 -0500
> From: Larry Stein <email@hidden>
> Subject: Banding on Apple 23" Cinema Display
> To: email@hidden
> Message-ID: <email@hidden>
> Content-Type: text/plain; charset="us-ascii"
>
> Hello All,
>
> Has anyone had problems with color banding on an apple 23" CD or
> other apple flat panels? I a m shooting jewelry (Imacon 528C -H1- -
> 16 bit files) on a middle gray sweep. I have a small spotlight
> hitting the background behind it creating a glow with the tones
> ranging from a light gray in the center to a charcoal gray at the
> edges. I am getting banding in the transition areas. I thought it
> was in the file and tried for hours to get rid of it. Changed lights
> twice, changed the angle of the light, tried diffusion material,
> changed lenses, software, restored calibration files, monitor
> profiles, and recalibrated the monitor. Finally tried a printout on
> my epson 2200 and the bands weren't there. So then I plugged in my
> old LaCIe CRT and couldn't see the bands there either. Then tried it
> on a mac G4 powerbook and Mac Powerbook and had banding on both. Then
> I tried it on a cheapo CRT and there was no banding. I have had
> this display for about 9 months and have never noticed this problem
> before. Can anyone help me to determine definitively that the
> problem is with the monitor and not in the file so I can feel
> confident about handing the files off to the client? Also, if it is
> the monitor, is it a defect or a shortcoming of the monitor, and can
> anything be done to correct it. Any thoughts would be greatly
> appreciated.
>
> Thanks in Advance,
> Larry Stein
>
> Larry Stein Photography
> www.larrystein.com
> 508-754-1470
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